Electric traction-motor.



No. 643,276. Patented Feb. I3, |900..

c. RICHTER &. R. T. ESCHLER.

ELECTBIB TRACTION MOTOR.

I (Application filed May 19. 1899.) (No Model.) 2 Sheets-Sheet l.

W :0: I w w g o No. 643,276. Patented Feb. l3, IQOO. C. RICHTER &. R. T.ESCHLER.

ELECTRIC TRACTION MOTOR.

(Applicatian filed May 19. 1899.)

2 Sheets-Sheet 2.

(No Model.)

a o o 0 w u aim-nu UNITED STATES PATENT OFFICE.

CHARLES RICHTER AND RICHARD T. ESCHLER, OF CAMDEN, NEW JERSEY, ASSIGNORSTO THE SECURITY TRUST AND SAFE DEPOSIT COMPANY,

TRUSTEE, OF NEW JERSEY.

ELECTRIC TRACTION-MOTOR.

SPECIFICATION forming part of Letters Patent No. 643,276, dated February13, 1900.

Application filed May 19, 1899. Serial No. 717,451. (No model.)

To aZZ whom it may concern.-

Be it known that we, CHARLES RICHTER and RICHARD T. Eso'HLER, citizensof the United States, residingin the city and county of Camden, State ofNew Jersey, have invented a new and useful Improvement in ElectricTraction-Motors, which improvement is fully set forth in the followingspecification and accompanying drawings.

Our invention relates to an improvement in an electric motor fortraction purposes; and it consists of a car-wheel containing electricmechanism adapted to operate the wheel by direct currents, so that thesame will rotate with great rapidity, while its construction is strongand durable.

It also consists of convenient means for access to the interior of thewheel and withdrawing the field-magnet core and connected parts.

It also consists of means for conveniently reaching the brushes of thecommutator.

It also consists of details of construction, all as will be hereinafterfully set forth, and particularly pointed out in the claims.

Figure 1 represents a partial front elevation and partial diametricalsection of a motor embodying our invention. Fig. 2 represents a sideelevation of a wheel employed with a side plate removed.

Similar letters of reference indicate corresponding parts in thefigures.

Referring to the drawings, A designates a car-axle,and B designatescar-wheels thereon, the former being stationarily mounted on the 3 5truck of a car and the latter rotating on said axle. The wheels arechambered and formed of side sections or webs C and D, provided withtrunnions or hubs E, with brasses or boxes F for said hubs, andpedestals or hang- 0 ers G, carrying said boxes and attached to thetruck, as best employed for running the car. The sections C and D areconnected by the bolts 1-1 and nuts J K, thus'firmly uniting the same,the section D in the present case having the flanges L of the wheelsthereon, said sections having also on their inner sides the commutatorsR. Within the chambers of each wheel are electromagnets N, whose cores Pare firmly secured to the axle A and carry on the sides thereof thebrushes Q, which contact with the commutators R on the inner side of theweb D. Connected with the rim S of the wheel, on the interior thereof,is the armature T, which freely encircles the fieldmagnet P, butrevolves with said wheel.

The axle A is hollow and receives the electric conductors U, the latterpassing through the portion of the axle within the wheel and joining themagnets and brushes. Connecting the armature and commutators are theelectric conductors V, it being seen that the wheel will be rotated byadirect current and so be powerful and rapid in its operation.

The axle A is formed in sections coupled in any suitable manner, so thatwhen the web C is removed the field-magnets and connected parts may bedrawn out with its section of the axle for purposes requiring the same.

In order to provide access to the interior of the wheel, especially tothe brushes Q, the latter occupy the recesses W in the field-magnetcore, and in the web C, opposite to or nearly opposite to said recesses,are openings or manholes X, which are closed by caps Y, which whenremoved uncover said recesses and consequently the brushes.

In the inner side of the web C, at the rim thereof, are recesses Z, thesame receiving and inclosing the nuts J of the bolts, the ends of thelatter having the nuts K thereon for tightening purposes,thuscontrolling the bolts and thereby firmly connecting the webs of thewheels. It will also be seen that the wheel is entirely closed, so thatdirt, &c., are prevented from entering the same.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

1. The combination of a hollow car-wheel having a web provided with amanhole, an axle carrying a field-magnet with an opening in the corethereof, and a brush seated in said opening, said manhole being oppositeto said opening.

2. The combination of an axle, a fieldmagnet and a brush thereon, and awheel mounted on said axle revolvingin suitable bearings, said wheelbeing composed of sections, one

provided with hubs rotating in suitable bearings, a fastening for saidsections, a commutator on the interior of one of the sections, afield-magnet Whichis secured to said axle, a brush carried by saidmagnet, an armature connected with the inner periphery of one of thesections, and an electric conductor leading to the interior of saidwheel.

CHARLES RICHTER. RICHARD T. ESOHLER. Witnesses:

J OHN A. WIEDERSHEIM, WM. 0. WIEDERsHEnvI.

